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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef IPC_IPC_LISTENER_H_
#define IPC_IPC_LISTENER_H_
#include "base/basictypes.h"
#include "build/build_config.h"
#include "ipc/ipc_export.h"
namespace IPC {
class Message;
// Implemented by consumers of a Channel to receive messages.
class IPC_EXPORT Listener {
public:
// Called when a message is received. Returns true iff the message was
// handled.
virtual bool OnMessageReceived(const Message& message) = 0;
// Called when the channel is connected and we have received the internal
// Hello message from the peer.
virtual void OnChannelConnected(int32 peer_pid) {}
// Called when an error is detected that causes the channel to close.
// This method is not called when a channel is closed normally.
virtual void OnChannelError() {}
#if defined(OS_POSIX)
// Called on the server side when a channel that listens for connections
// denies an attempt to connect.
virtual void OnChannelDenied() {}
// Called on the server side when a channel that listens for connections
// has an error that causes the listening channel to close.
virtual void OnChannelListenError() {}
#endif // OS_POSIX
protected:
virtual ~Listener() {}
};
} // namespace IPC
#endif // IPC_IPC_LISTENER_H_
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